show-combinators
Combinators to write Show instances
https://github.com/Lysxia/show-combinators#readme
| Version on this page: | 0.1.1.0 |
| LTS Haskell 22.39: | 0.2.0.0@rev:2 |
| Stackage Nightly 2024-10-31: | 0.2.0.0@rev:2 |
| Latest on Hackage: | 0.2.0.0@rev:2 |
Maintained by [email protected]
This version can be pinned in stack with:
show-combinators-0.1.1.0@sha256:1b5f8a2fa6051b5cd5b46efd234881d625cfa4847034f7fcdf6dd7eabbcc2476,1193Module documentation for 0.1.1.0
- Text
- Text.Show
Depends on 1 package(full list with versions):
Used by 1 package in lts-13.19(full list with versions):
Show combinators 
A minimal set of convenient combinators to write Show instances.
data MyType a
= C a a -- a regular constructor
| a :+: a -- an infix constructor
| R { f1 :: a, f2 :: a } -- a record
infixl 4 :+:
instance Show a => Show (MyType a) where
showsPrec = flip precShows where
precShows (C a b) = showCon "C" @| a @| b
precShows (c :+: d) = showInfix ":+:" 4 c d
precShows (R {f1 = e, f2 = f}) =
showRecord "R" ("f1" .=. e &| "f2" .=. f)